Here are some pictures and/or drawings of miscellaneous items from various makers. If the name of the submitter is underlined, you can go to the submitter’s web site. If you click on the picture of the support, you will go to a page that will give more explanation of it.
Need more workspace? I made a table out of a discarded ironing board and a piece of plywood. It’s the right shape for working on rods, the height is adjustable, and it folds for storage. Good for rod wrapping in front of a sunny window too.